There is a fault in the gearbox of my 2005 Legacy automatic, causing a shuddering. The Subaru franchisees tell me it is partly or wholly caused by my having replaced one tyre with a sidewall bulge at a time when the rest of the tyres were, say, half way through their useful life, thereby creating a difference between the overall radius of that wheel/tyre compared with that of the other three.
Has anyone heard of this problem? Does it ring true? If so, then it will always be difficult to replace just one tyre!